ELI5: Explain Like I'm 5

Convolution reverb

Let's say you like to sing in the shower because the acoustics make your voice sound really nice. That's because the sound of your voice is bouncing off the walls and creating a reverb effect. Convolution reverb works kind of like this, but instead of using your voice and a shower, it takes a sound and applies a different room's acoustics to it. It does this by taking a recording of a sound being played in a particular room and analyzing how the sound waves bounce off the walls, floor, and ceiling. Then, when you apply the convolution reverb to a different sound, it takes that sound and "convolves" or blends it with the recorded acoustics from the other room, making it sound like it was played in that room. So, if you record someone clapping their hands in a large concert hall, you can use convolution reverb to make a sound like a guitar or someone singing sound like it was recorded in that same concert hall. Pretty cool, huh?